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The Question & Answer (Q&A) Knowledge Managenet

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Table of Contents

- How do you find average speed with distance and time?
- How do you find average speed with velocity and time?
- When would you use the formula for average speed?
- What is the symbol of average speed?
- Can the speed of a body be negative?
- Why can average speed never be zero?
- Can distance Travelled be 0?
- Why is distance not negative?
- What must be true if the distance an object traveled is zero?
- Is it possible to travel 5000 m and have a displacement of 0 m?
- Is it possible to travel a distance but have no displacement?
- What is difference between velocity and speed?
- What is the total displacement for the entire trip?
- What is the formula for finding total distance?
- What is the formula for calculating displacement?
- What is the formula for position?
- What is the formula to find position?
- What is final position in physics?

You can find the average speed of an object if you know the distance travelled and the time it took. The formula for speed is speed = distance ÷ time.

Provided an object traveled 500 meters in 3 minutes , to calculate the average velocity you should take the following steps:

- Change minutes into seconds (so that the final result would be in meters per second). 3 minutes = 3 * 60 = 180 seconds ,
- Divide the distance by time: velocity = 500 / 180 = 2.77 m/s .

Average speed formula is used to find the uniform rate which involves something travelling at fixed and steady pace. For example, A car travels 3 hours. It travels 30 miles in the first hour, 45 miles in the second hour and 75 miles in the third hour.

1. Notation, Terminology, Definitions

Quantity | Symbol | SI Unit |
---|---|---|

Average velocity (a vector and therefore denoted av in boldface with an arrow on top) | av | m/s, direction |

Magnitude of the average velocity | | av| | m/s |

Average speed (a scalar and therefore denoted vav in plain face without an arrow) | vav | m/s |

It can be zero but it cannot be negative, and also the time can never be zero or negative. So, the speed is the ratio of two quantities which are non-negative. Hence the speed of a body cannot be negative in any condition.

Speed is the distance travelled in the given time. Distance can never be zero. Therefore, average speed will always be a positive value and will not be zero. Speed is a scalar quantity and has only magnitude.

No, Distance travelled cannot be zero when displacement is not zero because distance is always greater or equal to displacement…..

Answer: Distance is non-negative for the same reasons as magnitude (it is a measure of length, and the formula squares the values). The distance between two identical vectors is 0, otherwise distance will be positive. Question: Can dot product be negative?

Hence, If the distance traveled by an object is zero, then the displacement of the object is also zero.

Answer: it is not possible to travel 5000 metre because when the displacement is zero then it means no distance cover by it.

Yes, the object instead of moving through a distance can have zero displacement. Example: If an object travels from point A and reaches to the same point A, then its displacement is zero.

Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object’s movement.

Displacement is dependent on the direction an object moves. When an object comes back to its origin it is said to have zero displacement. Therefore the total displacement of travel is the whole distance traveled from the beginning to the end of the journey.

If a body with position function s (t) moves along a coordinate line without changing direction, we can calculate the total distance it travels from t = a to t = b. If the body changes direction one or more times during the trip, then we need to integrate the body’s speed |v (t)| to find the total distance traveled.

Displacement can be calculated by measuring the final distance away from a point, and then subtracting the initial distance. Displacement is key when determining velocity (which is also a vector). Velocity = displacement/time whereas speed is distance/time.

A common application of derivatives is the relationship between speed, velocity and acceleration. In these problems, you’re usually given a position equation in the form “ x=” or “ s ( t ) = s(t)= s(t)=”, which tells you the object’s distance from some reference point.

Position Formula

- Change in position is given by:
- Δr = r2 – r1.
- If the change in position is dependent upon time, then the position can be represented as.
- r (t) = ½ at2 + ut + r1.
- Where a = constant acceleration.
- u = initial velocity.
- r = initial position.
- Example:

FINAL POSITION is that a body stopped or covered a distance from a point to another point.